Add libavfilter 1-input - 1-output regression test, corresponding to the

target regtest-lavfi_pix_fmts.

The lavfi_pix_fmts test is disabled, this because there are
many tests which are failing, and there are still some output files
which cannot be played by NUT/ffplay.

Originally committed as revision 23297 to svn://svn.ffmpeg.org/ffmpeg/trunk

Makefile

@@ -261,6 +261,7 @@ LAVFI_TESTS =           \
     vflip               \
     vflip_crop          \
     vflip_vflip         \
+#   lavfi_pix_fmts      \
 
 ACODEC_TESTS := $(addprefix regtest-, $(ACODEC_TESTS) $(ACODEC_TESTS-yes))
 VCODEC_TESTS := $(addprefix regtest-, $(VCODEC_TESTS) $(VCODEC_TESTS-yes))
@@ -309,7 +310,7 @@ $(LAVF_TESTS):
 	@$(SRC_PATH)/tests/lavf-regression.sh $@ lavf tests/vsynth1 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 	@diff -u -w $(call REFFILE,lavf,$@) $(call RESFILE,lavf,$@)
 
-$(LAVFI_TESTS):
+$(LAVFI_TESTS): tools/lavfi-showfiltfmts$(EXESUF)
 	@echo "TEST LAVFI $(@:regtest-%=%)"
 	@$(SRC_PATH)/tests/lavfi-regression.sh $@ lavfi tests/vsynth1 "$(TARGET_EXEC)" "$(TARGET_PATH)"
 	@diff -u -w $(call REFFILE,lavfi,$@) $(call RESFILE,lavfi,$@)

tests/lavfi-regression.sh

@@ -14,6 +14,18 @@ eval do_$test=y
 rm -f "$logfile"
 rm -f "$benchfile"
 
+get_common_elements() (
+    l1=$1
+    l2=$2
+    for elt1 in $1; do
+        for elt2 in $2; do
+            [ $elt1 = $elt2 ] && res="$res $elt1 "
+        done
+    done
+
+    echo $res
+)
+
 do_lavfi() {
     test_name=$1
     eval test=\$do_$test_name
@@ -35,9 +47,32 @@ do_lavfi "vflip"              "vflip"
 do_lavfi "vflip_crop"         "vflip,crop=100:100"
 do_lavfi "vflip_vflip"        "vflip,vflip"
 
+# all these filters have exactly one input and exactly one output
+filters_args="
+crop=100:100:100:100
+null
+pad=500:400:20:20
+scale=200:100
+vflip
+"
+
+if [ -n "$do_lavfi_pix_fmts" ]; then
+    scale_out_pix_fmts=$(tools/lavfi-showfiltfmts scale | grep "^OUTPUT" | cut -d: -f2)
+
+    for filter_args in $filters_args; do
+        filter=$(echo $filter_args | sed -e 's/\([^=]\+\)=.*/\1/')
+        in_pix_fmts=$(tools/lavfi-showfiltfmts $filter | grep "^INPUT" | cut -d: -f2)
+        pix_fmts=$(get_common_elements "$in_pix_fmts" "$scale_out_pix_fmts")
+
+        for pix_fmt in $pix_fmts; do
+            do_video_encoding "${pix_fmt}-${filter}.nut" "" \
+                "-vf slicify=random,format=$pix_fmt,$filter_args -vcodec rawvideo -pix_fmt $pix_fmt"
+        done
+    done
+fi
+
 # TODO: add tests for
 # direct rendering,
-# slices
 # chains with feedback loops
 
 rm -f "$bench" "$bench2"

tools/lavfi-showfiltfmts.c

+/*
+ * Copyright (c) 2009 Stefano Sabatini
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavformat/avformat.h"
+#include "libavutil/pixdesc.h"
+#include "libavfilter/avfilter.h"
+
+int main(int argc, char **argv)
+{
+    AVFilter *filter;
+    AVFilterContext *filter_ctx;
+    const char *filter_name;
+    const char *filter_args = NULL;
+    int i, j;
+
+    av_log_set_level(AV_LOG_DEBUG);
+
+    if (!argv[1]) {
+        fprintf(stderr, "Missing filter name as argument\n");
+        return 1;
+    }
+
+    filter_name = argv[1];
+    if (argv[2])
+        filter_args = argv[2];
+
+    avfilter_register_all();
+
+    /* get a corresponding filter and open it */
+    if (!(filter = avfilter_get_by_name(filter_name))) {
+        fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
+        return 1;
+    }
+
+    if (!(filter_ctx = avfilter_open(filter, NULL))) {
+        fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
+        return 1;
+    }
+    if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
+        fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args);
+        return 1;
+    }
+
+    /* create a link for each of the input pads */
+    for (i = 0; i < filter_ctx->input_count; i++) {
+        AVFilterLink *link = av_malloc(sizeof(AVFilterLink));
+        filter_ctx->inputs[i] = link;
+    }
+    for (i = 0; i < filter_ctx->output_count; i++) {
+        AVFilterLink *link = av_malloc(sizeof(AVFilterLink));
+        filter_ctx->outputs[i] = link;
+    }
+
+    if (filter->query_formats)
+        filter->query_formats(filter_ctx);
+    else
+        avfilter_default_query_formats(filter_ctx);
+
+    /* print the supported formats in input */
+    for (i = 0; i < filter_ctx->input_count; i++) {
+        AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
+
+        printf("INPUT[%d] %s: ", i, filter_ctx->filter->inputs[i].name);
+        for (j = 0; j < fmts->format_count; j++)
+            printf("%s ", av_pix_fmt_descriptors[fmts->formats[j]].name);
+        printf("\n");
+    }
+
+    /* print the supported formats in output */
+    for (i = 0; i < filter_ctx->output_count; i++) {
+        AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
+
+        printf("OUTPUT[%d] %s: ", i, filter_ctx->filter->outputs[i].name);
+        for (j = 0; j < fmts->format_count; j++)
+            printf("%s ", av_pix_fmt_descriptors[fmts->formats[j]].name);
+        printf("\n");
+    }
+
+    fflush(stdout);
+    return 0;
+}